21318255

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1327}}^1$

素因数の和:1365

約数の個数: 64

約数和(自身を含む): 45895680

約数和(自身を除く): 24577425

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 85, 105, 119, 135, 153, 189, 255, 315, 357, 459, 595, 765, 945, 1071, 1327, 1785, 2295, 3213, 3981, 5355, 6635, 9289, 11943, 16065, 19905, 22559, 27867, 35829, 46445, 59715, 67677, 83601, 112795, 139335, 157913, 179145, 203031, 250803, 338385, 418005, 473739, 609093, 789565, 1015155, 1254015, 1421217, 2368695, 3045465, 4263651, 7106085, 21318255]

約数ペア:

[(1, 21318255), (3, 7106085), (5, 4263651), (7, 3045465), (9, 2368695), (15, 1421217), (17, 1254015), (21, 1015155), (27, 789565), (35, 609093), (45, 473739), (51, 418005), (63, 338385), (85, 250803), (105, 203031), (119, 179145), (135, 157913), (153, 139335), (189, 112795), (255, 83601), (315, 67677), (357, 59715), (459, 46445), (595, 35829), (765, 27867), (945, 22559), (1071, 19905), (1327, 16065), (1785, 11943), (2295, 9289), (3213, 6635), (3981, 5355)]